The act of farting in a car while locking the windows so other riders can't roll them down to relieve the stench, sealing in the smell like a crockpot. This is best done while the heat is on to maximize the odor.

When one takes a monstrous repugnant shit and then without flushing immediately takes a scolding hot shower. The door and all the windows must be shut and the toilet seat must be up. If all these steps are taken then the feces will cook and fester resembling the effects of a crock pot.

Guy 1 "What did you do last night?"
Guy 2 "My roommate was pissing me off so I left him a filthy crock pot.

A "Crockpot" or "Crockpotting" refers to the act of a man cumming in a woman's or man's mouth and restricting her/him, simultaneously, from spitting it out OR swallowing, thus creating the effect of "Crockpotting" the liquid within her mouth cavity.

By placing the hand over the mouth and gripping the neck at the same time, immediately after ejaculation, the semen/sperm is trapped in the mouth for Crockpotting.